LNBS21PD(2002) 查看數據表（PDF） - STMicroelectronics

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LNBS21PD
(Rev.:2002)

LNB SUPPLY AND CONTROL IC WITH STEP-UP CONVERTER AND I2C INTERFACE

STMicroelectronics 

LNBS21

Symbol

Parameter

Test Conditions

∆VO Line Regulation

VIN1=8 to 15V

VSEL=0

VSEL=1

∆VO Load Regulation

VSEL=0 or 1 IOUT = 50 to 750mA

IMAX Output Current Limiting

ISEL=1

ISEL=0

ISC Output Short Circuit Current

ISEL=1

ISEL=0

tOFF Dynamic Overload

protection OFF Time

PCL=0

Output Shorted

tON Dynamic Overload

protection ON Time

PCL=0

Output Shorted

fTONE Tone Frequency

TEN=1

ATONE Tone Amplitude

TEN=1

DTONE Tone Duty Cycle

TEN=1

tr, tf Tone Rise and Fall Time TEN=1

GEXTM External Modulation Gain ∆VOUT/∆VEXTM, f = 10Hz to 40KHz

VEXTM External Modulation Input AC Coupling

Voltage

ZEXTM External Modulation

Impedance

f = 10Hz to 50KHz

VLT Loopthrough Switch Voltage EN=0,

Drop (lt1 to LT2)

ILT=300mA, VMI=12 or 19V

fSW DC/DC Converter Switch

Frequency

fDETIN Tone Detector Frequency 0.4Vpp sinewave

Capture Range

VDETIN Tone Detector Input

Amplitude

fIN=22kHz sinewave

ZDETIN Tone Detector Input

Impedance

VOL Overload Flag Pin Logic

LOW

Tone present

IOL=2mA

IOZ Overload Flag Pin OFF

State Leakage Current

Tone absent

VOH = 6V

VIL DSQIN Input Pin Logic

LOW

VIH DSQIN Input Pin Logic

HIGH

IIH DSQIN Pins Input Current VIH = 5V

IOBK Output Backward Current EN=0

VOBK = 18V

TSHDN Temperature Shutdown

Threshold

∆TSHDN Temperature Shutdown

Hysteresis

Min.

650

750

Typ.

5

5

300

400

900

Max.

40

60

200

900

1000

tOFF/10

20

22

24

0.55 0.72 0.9

40

50

60

5

8

15

6

400

260

0.35 0.6

220

18

24

0.2

1.5

150

0.3

0.5

10

0.8

2

15

-4

-10

150

15

Unit

mV

mV

mV

mA

mA

mA

mA

ms

ms

KHz

Vpp

%

µs

mVpp

Ω

V

kHz

kHz

Vpp

kΩ

V

µA

V

V

µA

mA

°C

°C

9/19

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